Two Blizzard stablemates anchor the top of Heroes of the Storm's similarity graph: Diablo at 0.79 and Hearthstone at 0.77 form a clear first peak, both Video Game Franchises sharing the same publisher ecosystem. That pairing is the two-peak structure — but the second cluster is where the shape gets interesting.
Below those two, the top 10 spreads across a noticeably mixed set of subcategories. The Witcher (0.68, TV Shows) and Doctor Who (0.64, TV Shows) represent the second neighborhood: genre-adjacent television rather than gaming. Between them sits Blizzard Entertainment (0.67, Game Developers) and D&D Beyond (0.65, Toys and Games), with World of Warcraft (0.64, Video Game Franchises) rounding out the set. id Software (0.62, Game Developers) and Gordon Ramsay (0.62, TV Personalities) extend the range further, and Mass Effect (0.61, Video Game Franchises) closes the top 10.
Tallying subcategories across the ten neighbors: four are Video Game Franchises, two are Game Developers, two are TV Shows, one is Toys and Games, and one is a TV Personality. The audience bridges a Blizzard-franchise core and a broader speculative-fiction media cluster — the two peaks are same-publisher gaming on one side and genre television on the other.
This shape suggests an audience defined less by the MOBA format specifically and more by a taste profile that spans Blizzard's catalog and fantasy/sci-fi media broadly.